Heater



FIG. 1 is a front, left, and top perspective view of a heater, showingmy design;

FIG. 2 is a rear, right, and top perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlarged detail view of portion 9 in FIG. 1 .

The broken lines shown in the drawings are included for the purpose ofillustrating portions of the heater that form no part of the claimeddesign.

CLAIM The ornamental design for a heater, as shown and described.